kleinerm/Psychtoolbox-3 — pull request #19 by zacklb (2013-02-27 18:58:27+00:00)
Title: Fixing a redundancy when using a Keyspan USB-serial adapter

Keyserial1 is an alias to the first port on your Keyspan adapter
(regardless if it's single- or multi-port). USA19* is a prefix to the
raw port on a single-port adapter. Therefore it's redundant to have
both in PortDB. In fact it's an error when FindSerialPort finds > 1
match by default.